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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// MediaStreamUIController is used to decide which of the available capture
// device to use as well as getting user permission to use the capture device.
// There will be one instance of MediaStreamDeviceSettings handling all
// requests.
// Expected call flow:
// 1. MakeUIRequest() is called to create a new request to the UI for capture
// device access.
// 2. Pick device and get user confirmation.
// 3. Confirm by calling SettingsRequester::DevicesAccepted().
// Repeat step 1 - 3 for new device requests.
#ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_UI_CONTROLLER_H_
#define CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_UI_CONTROLLER_H_
#include <map>
#include <string>
#include "base/basictypes.h"
#include "base/memory/weak_ptr.h"
#include "content/browser/renderer_host/media/media_stream_provider.h"
#include "content/public/browser/web_contents_delegate.h"
namespace content {
class MediaStreamRequestForUI;
class SettingsRequester;
// MediaStreamUIController is responsible for getting user permission to use
// a media capture device as well as selecting what device to use.
class CONTENT_EXPORT MediaStreamUIController {
public:
explicit MediaStreamUIController(SettingsRequester* requester);
virtual ~MediaStreamUIController();
// Called when a new request for the capture device access is made.
// Users are responsbile for cancel the pending request if they don't wait
// for the result from the UI.
void MakeUIRequest(const std::string& label,
int render_process_id,
int render_view_id,
const StreamOptions& stream_components,
const GURL& security_origin,
MediaStreamRequestType request_type,
const std::string& requested_device_id);
// Called to cancel a pending UI request of capture device access when the
// user has no action for the media stream InfoBar.
void CancelUIRequest(const std::string& label);
// Called by the InfoBar when the user grants/denies access to some devices
// to the webpage. This is placed here, so the request can be cleared from the
// list of pending requests, instead of letting the InfoBar itself respond to
// the requester. An empty list of devices means that access has been denied.
// This method must be called on the IO thread.
void PostResponse(const std::string& label,
const MediaStreamDevices& devices);
// Called to signal the UI indicator that the devices are opened.
void NotifyUIIndicatorDevicesOpened(
int render_process_id,
int render_view_id,
const MediaStreamDevices& devices);
// Called to signal the UI indicator that the devices are closed.
void NotifyUIIndicatorDevicesClosed(
int render_process_id,
int render_view_id,
const MediaStreamDevices& devices);
// Used for testing only. This function is called to use faked UI, which is
// needed for server based tests. The first non-opened device(s) will be
// picked.
void UseFakeUI();
private:
typedef std::map<std::string, MediaStreamRequestForUI*> UIRequests;
// Returns true if the UI is already processing a request for this render
// view.
bool IsUIBusy(int render_process_id, int render_view_id);
// Process the next pending request and bring it up to the UI on the given
// page for user approval.
void ProcessNextRequestForView(int render_process_id, int render_view_id);
// Posts a request to be approved/denied by UI.
void PostRequestToUI(const std::string& label);
// Posts a request to fake UI which is used for testing purpose.
void PostRequestToFakeUI(const std::string& label);
SettingsRequester* requester_;
UIRequests requests_;
// See comment above for method UseFakeUI. Used for automated testing.
bool use_fake_ui_;
base::WeakPtrFactory<MediaStreamUIController> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(MediaStreamUIController);
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_MEDIA_MEDIA_STREAM_UI_CONTROLLER_H_
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